"abord" and "aborder"

i know "d'abord" means "first" as in "firstly" and "tout d'abord" means "first of all." i also know "aborder" can mean "to approach" and to "begin something".

1) from looking at the dictionary, it appears that u don't just use it to say "i'm going to start cleaning now." there seems to b the connotation that u're beginning something difficult. there's even the example of "aborder une probleme."

2) i like the usage that u're starting a new phase, a new chapter, a new career or biz.

3) i see it used when u reach the shore. i would use "gagner" but i will add "aborder"

4) these seem to b important if they are regularly used as i would think: